$this->db->query("SELECT * FROM `tbl_doctor_leave` WHERE NOT($date > `tbl_doctor_leave`.`start_date` OR $date < `tbl_doctor_leave`.`end_date`)")->result();
// $leave_query = $this->db->query("SELECT * FROM `tbl_doctor_leave` WHERE NOT($date > `tbl_doctor_leave`.`start_date` OR $date < `tbl_doctor_leave`.`end_date`)")->result();